Question

a plumbing trap
provides a flow of air to and from the drainage system
prevents foreign objects from clogging the drainage system
provides a liquid seal which prevents the passage of air/gas
controls the discharge of water or sewage into the sanitary system
keeps bacteria and vermin from entering the house through the drainage system
question 36
1 pts
home inspectors should not turn on plumbing systems that have been turned off for all of the following reasons except which one?
there may be a leak in the piping
it is the clients responsibility
there may be a leak at the fixture
there may be a leak at the water heater
the system may have been winterized and you will wash antifreeze out of the system

Explanation:

A plumbing trap creates a liquid - seal (usually water) that stops sewer gases from entering the living space. For the second question, home inspectors avoid turning on plumbing systems that have been off due to various leak - related risks and winterization concerns, but it's not because it's the client's responsibility.

Answer:

1. provides a liquid seal which prevents the passage of air/gas
2. it is the client's responsibility